A5012934639- Gyrotron and Vacuum Electronics Research
- Microwave Engineering and Waveguides
- Pulsed Power Technology Applications
- Terahertz technology and applications
- Silicon Carbide Semiconductor Technologies
- Semiconductor materials and devices
- Metamaterials and Metasurfaces Applications
- Semiconductor materials and interfaces
- Antenna Design and Analysis
- Particle accelerators and beam dynamics
- Advancements in Semiconductor Devices and Circuit Design
- Advanced Antenna and Metasurface Technologies
- Induction Heating and Inverter Technology
- Engineering Applied Research
- Electronic Packaging and Soldering Technologies
- Particle Accelerators and Free-Electron Lasers
- Mineral Processing and Grinding
- Radio Frequency Integrated Circuit Design
- Electromagnetic Simulation and Numerical Methods
- Integrated Circuits and Semiconductor Failure Analysis
- GaN-based semiconductor devices and materials
- Minerals Flotation and Separation Techniques
- Metal Extraction and Bioleaching
- Photonic and Optical Devices
- Insects and Parasite Interactions
China Electronic Product Reliability and Environmental Test Institute
2022-2024
Ministry of Industry and Information Technology
2024
University of Electronic Science and Technology of China
2017-2022
Guilin University of Electronic Technology
2018
The sine waveguide (SWG) is presented as a potential slow-wave structure (SWS) for the millimeter-wave (mm-wave) and terahertz (THz) traveling-wave tube (TWT) because of advantages wide bandwidth, natural electron beam tunnel, easy fabrication. In particular, this theoretical study indicates that transmission loss SWG far less than folded SWS, which widely employed in mm-wave THz TWT. Here, flat-roofed circuit working <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...
In this article, a 1-THz traveling-wave tube (TWT) based on flat-roofed sine waveguide (SWG) slow wave structure (SWS) has been studied theoretically and experimentally, parts of the component have fabricated. First, SWG SWS optimized for working at 1 THz, normalized phase velocity is around 0.287, interaction impedance over 3.5 Ω in frequency range 1.02-1.04 THz. Meanwhile, performance designed TWT simulated, whose saturated output power 720 mW corresponding gain 28.57 dB. What more, to...
Meander lines (MLs) in two configurations are presented to reduce the mutual coupling (MC) between microstrip patch antenna elements. Inserting a slot ground plane elements is simple method MC, while adding MLs of can further MC. In first configuration, one ML inserted and maximum MC reduction 39 dB throughout −10 bandwidth achieved. What’s more, radiation patterns not changed compared with dual-element array slotted ground. For second added It found that isolation 53 be obtained. However,...
An innovative complementary electric split-ring resonator metamaterial (MTM) structure applied as the slow-wave circuit for a cascade backward-wave oscillator (CBWO) operating in C-band is studied this paper. The idea of drift tube multiresonant cavity extended interaction klystron borrowed to design novel (BWO). construction device features two BWOs separated by short cutoff waveguide permitting flow electron beam and stopping electromagnetic wave. high-frequency characteristics are...
A W-band sheet electron beam (SEB) traveling-wave tube (TWT) based on flat-roofed sine waveguide slow-wave structure (FRSWG-SWS) is proposed. The wave of the metal grating replaced by a around tunnel. characteristics including dispersion properties and interaction impedance have been investigated using eigenmode solver in 3-D electromagnetic simulation software Ansoft HFSS. Through calculations, FRSWG SWS possesses larger average than conventional (SWG) frequency range 86-110 GHz. beam-wave...
In this letter, the modified flat-roofed sine waveguide slow-wave structure (FRSWG-SWS) is proposed for wideband high-power sub-terahertz traveling-wave tube (sub-THz TWT), which possesses advantages of wide operating bandwidth, low loss, minimal reflection, and ease fabrication. The simulation results demonstrate that transmission parameter more than −5.0 dB in frequency range between 210 250 GHz. beam–wave interaction indicate FRSWG can provide over 50 W output power 30 gain from 205 to...
The W-band flat-roofed sine waveguide (SWG) slow wave circuit was designed and processed in this article. Considering the limitations on present practical fabrication level, sensitivity analysis performed potential influencing factors for performance of SWG structure (SWS). As indicated by calculation results, gap between SWSs side-wall strips could have a significant impact dispersion, interaction impedance, transmission entire circuit. Based theoretical analysis, two types circuits were...
A theoretical model is proposed for linear analysis of the beam–wave interaction in a sine waveguide (SWG) with slow-wave structure. The field expressions and “hot” dispersion equation are obtained by means matching. ohmic loss attenuation constant due to imperfect conductors also derived using model. Moreover, effects voltage, current, beam thickness, period, oscillation amplitude on gain bandwidth calculated. results indicate peak 3-dB 6.82 dB/cm 19.5%, respectively, 0.22-THz SWG...
The transport of sheet electron beam (SEB) is critical importance for the success a number high-power millimeter wave and terahertz vacuum devices. In this paper, condition to achieve SEB's stable in uniform longitudinal magnetic field studied. Based on stability condition, new approach, named matching focusing (SEB-MFM) field, which consists component tiny transverse component, presented. SEB-MFM can be generated by adding extra transversely magnetized magnets conventional (UM) system. For...
In this article, a potentially pseudoperiodic slow wave structure (SWS) for broadband, high-power, helix traveling-wave tube (TWT) is studied. The considered here suppresses the back-wave oscillations caused by large working current. These do not have conventional uniform pitch distributions in radial dimension; rather, two configurations studied article are gradient and conical helix. Through reasonable design number of calculations, entire consists four tapered, pitch-varying SWSs....
A sine waveguide (SWG) traveling-wave tube with sheet electron beam tunnel is proposed to amplify the high-frequency terahertz wave. In this study, slow wave characteristics including dispersion properties and interaction impedances have been investigated by using eigenmode solver in 3D electromagnetic simulation software Ansoft HFSS. The truncated SWG structure possesses relatively large average coupling impedance. beam–wave of are calculated CST. From particle-in-cell results, circuit can...
There is an increasing interest for the high-power, high-frequency electromagnetic wave generation by sheet electron beam (SEB) vacuum devices, and in which, transport of SEB conducted periodic cusped magnetic (PCM) a key issue. While PCM will meet serious challenges especially case high current density low kinetic energy electrons, analysis indicates that easy breaking stability focused may be caused tiny deviation transverse field from theoretical value. To guarantee stable long-distance...
In this paper, a proper theoretical model is proposed to investigate dispersion characteristics of the sine waveguide slow-wave structure. Based on model, equation obtained utilizing field matching method. Through numerical calculation, are calculated and results agree well with simulation results.
A 0.38THz Traveling Wave Tube (TWT) based on the sine waveguide and sheet beam tunnel is proposed to amplify terahertz wave. In this paper, high frequency characteristics of with are calculated by 3-D simulation software. From particle-in-cell results, beam-wave interaction can produce output power 13W at 0.38THz, corresponding gain reaches 34.15dB. addition, 3-dB bandwith TWT exceeds 36GHz.
The present study develops a dual-beam flat-roofed sine waveguide slow wave structure (SWG SWS) by complying with the conventional SWG SWS in this article. Through placement of metal plate electron beam tunnel center SWS, is divided into two tunnels. exhibits wide working bandwidth, low loss, and small reflection optimizing structural size SWG. Moreover, comparison drawn characteristics beam–wave interaction between As revealed from results, output power level traveling-wave tube (TWT)...
A W-band phase-velocity-taper Sine waveguide traveling wave tube (TWT) with sheet electron beam is proposed to amplify the millimeter wave. In this paper, high frequency characteristics of sine tunnel are simulated by 3-D simulation software. The results also show that phase taper structure can produce over 235W output power and 32dB gain at typical 94GHz an operating voltage 20.3 kV, a current 0.2A, input 150mW. corresponding more than30dB from 90GHz 100GHz. particle-in-cell indicate...